Screen for threshing-machines.



s. RMURPHY. & 1). H. SEALEI SCREEN FOR THRESHING MACHINES.

APPLICATION FILED APR. 20, 1908.

Patented Aug. 9, 1910.

wugnto ze dummy r one SHERMAN .P. MURPHY AND DANIEL H. SEALE, OF BERLIN, OKLAHOMA.

SCREEN FOR THRESHING-MACHINES.

Specification of Letters Patent.

Patented Aug. 9, 1910.

Application filed April 20, 1908. Serial No. 428,154.

To all whom it may concern:

Be it known that we, SHERMAN P. MURPHY and DANIELH. SEALE, citizens of the United States, residing at Berlin, in the county of Roger Mills and State of Oklahoma, have invented certain new and useful Improvements in Screens for Threshing-Machines, of which the following is a specification, reference being bad to the accompanying drawmgs.

Our invention relates to improvements in screens or sieves for threshing machines.

One object of the invention is to provide a screen of this character especially adapted for separating alfalfa and other small seed.

Another object of the invention is to provide a screen of this character which will be simple and inexpensive in construction and at the same time very strong and durable.

With the above and. other objects in view, the invention consists of the novel features of construction and the combination and arrangement of parts hereinafter fully described and claimed and illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of our improved screen; Fig. 2 is a bottom plan view; Figs. 3 and 4 are longitudinal and transverse sectional views; and Figs. 5 and 6 are detail perspective views of the metal reinforcing plates at. the corners of the body of the screen.

()ur improved screen comprises an open body or frame 1 preferably of rectangular form and over the top of which is stretched andsuitably secured upper and lower layers of woven wire 2, 3; The upper layer 2 is of very fine mesh to especially adapt the screen for use in separating alfalfa and other small seed. The lower layer or covering 3 is composed of woven wire of very large or coarse mesh and is adapted to effectively support the upper layer 2.

lVhile the frame 1 may preferably make it rectangular in shape and of two longitudinal side bars 4 and two transverse end bars 5, the ends of said bars being recessed to fit each other and suitably secured by nails, screws, or other fastenings. The frame is also provided with one or more longitudinal reinforcing bars 7 arranged between the end bars 5, as shown more clearly in Figs. 2 and 3. Said intermediate reinbe of any suitable form and construction, as above noted, we.

forcing bars 7 are notched to receive the bars 5 and to permit the upper edges of said bars 7 to bear against the bottom face of the lower screen layer 3 to prevent the same from, sagging or dropping down, as shown more clearly in Fig. 4. Said frame isfurther reinforced and strengthened at its four corners by metallic plates 8, 8-9, 9. The plates 8, 8 are arranged at the corners of the front end of the frame and each is of substantially U-shape having an upper triangular portion 10 to rest upon :the top of the frame, a lower right angular portion 11 to engage the bottom of the frame and an upright connecting portion 12 toengage the end of the frame. These plates 8 are secured by nails or other suitable fastenings. The plates 9 are secured upon the bottom of the frame at its rear end and are right angular in shape, each being of L-form and having a long arm or portion 13 secured to the bottom of one of the side bars 4 and a short arm or portion 14 secured to the bottom of the end bar 5 and formed at a suitable point on its'outer edge with an upwardly bent loop or eye 15. The outer edges of the portions 13 of the plates 9 are also formed with notches or recesses 16 to register with similar shaped notches or recesses 17 formed in the outer edges of the side-bars 4, of the frame, said notches or recesses and the eyes or loops 15 being provided to mount the screen in the threshing machine.

While the screen or woven wire layers or coverings may be secured upon the top of the frame in any suitable manner, we preferably effect the same by providing upon the top of the end bars'5 metal plates 18 which overlap the ends of the layers or screens to retain themupon the frame. We also secure upon the top of each of the side bars 4 longitudinal retainin strips 19 which overlap the side edges of said layers or screens and retain them upon the side bars 4. We also preferably provide intermediate longitudinal fastenin strips 20 arranged upon the tops of said ayers or screens and secured to the tops of .the longitudinal reinforcing and ippporting bars 7, as shown more clearly in From the foregoing it will be seen that. our invention provides a threshing machine screen which is strong and durable and especially adapted for handling alfalfa and other small seed.

Having thusdescribed our invention what we claim is: I

A screen frame of the character described comprising side and end bars, the side bars having recesses in their outer faces, a plurality of layers of screen material having their margina edges contacting with the upper faces of all of said bars, metallic strips secured to said bars and over the edges of the screen material, plates secured to the cornersof one end of the frame, the metallic strips of the side bars having edge recesses which register with the recesses in the side bars, L-shaped plates for the other corners of the frame which are secured to the under sides of the side bars and to one of the end bars, said plateshaving edge notches in their longer arms whlch reg1ster.with the recesses of t e side bars and metallic strips, and the shorter arms of said plates having eyes formed thereon, and projecting rearwardly therefrom, substantially as specified.

In testimony whereof we hereunto afiix our signatures in the presence of two witnesses.

SHERMAN P. MURPHY. DANIEL H. SEALE.

Witnesses:

E. L. MARTIN, ERNEST MCKEOWN. 

